zongshen carb diaphragm problem!
 

Hy guys! Well i have a problem... :(
My zong uses a tekei 28mm carb with a diaphragm as you all know...
The problem is-after i removed the top black cap to inspect the diaphragm and ensure its undamaged i tried to put it together and its about 2 mm too big all around the carbs body. 8O
I succeded to put it together using a small flat screwdriver while appling pressure on the cap where the diaphragm seated in the groove so it couldnt pop out again.
Bike works good,idles good,rides good... :?

The question is,if its not seated good (diaphragm) could the bike start,idle and run without showing some major problems?

Is there any spare diaphragms to buy (and where) or is interchangeable with some other carb diaphragms?

Here in Croatia i can only buy a new TK carb, no spare parts!!! :evil:

Can i switch TeiKei with Mikuni mv24 28mm carb that doesent use a diaphragm?

Thanks for your answeres! :)

If it runs good you got it back together OK and it should not be leaking. The rubber must be deteriorated maybe from exposure to fuel. Don't take it apart again and you should be good. I think the Yamaha TW200 uses the same carb so you can maybe get a diaphram from them, but it does not sound like you need to.

Thanks for the tip FastDoc! :)
Ill try in Yamaha store.
I just wanna have one of these in spare...im always suspicious on these vacuum things :lol:
Although its good i took it apart,someone took it apart before i bought it and the little spring on top of the needle droped down it the vacuum piston and jamed there. I dont know how it worked without that on the needle :?
I mounted it back on top of the needle before i put everything together.
Thanks for the fast answer! :)

$28 at bike bandit.

http://www.bikebandit.com/houseofmot...0452#sch534302

Re: zongshen carb diphragm problem!
 

If the bike runs well, you put it back together properly, Azriel. :)
FastDoc is correct. ;) Your Teikei, MV28 carburetor is almost identical to the Teikei, MV28 carburetors installed in the 2010, Yamaha, TW200 motorcycles sold in the United States. I assume the TW200 sold in Croatia employs the same carburetor. ;) Therefore, you can buy almost all the replacement parts you need for your carburetor from Yamaha. :)
I don't know about the Mikuni, MV24 carburetor. :? However, a forum member from Australia installed a different carburetor in his Zong. :) You can find the thread by searching the Dual Sport Forum. ;)

Spud :)

When i got a tear on my 400cc carb diaphram it was starting, idling and running ok on normal speeds.Only when i tryed to rev it up to higher rpm i noticed that instead speeding up it was loosing power. Higher gears i noticed it real well, when i did opened gas all out it started booing and bike lost power instead gaining it.
At the Honda store here in Finland they wanted about 200 euros for
that slide and rubber. :roll:
So i did buy new carb without secondary slide and what also have
acceletor pump on it for 200 euros and what difference it had.
Bike takes off much faster now and on big uphills i see big difference.
( better way )
I know that i have different bike but i guess that they have similar carbs,
only my is 32mm.

Thanks for all your answers guys!!! :)
Ill try to get one of these in reserve, just in case...
Zong has 8000 kms and the diaphragm is allready to big, like shoes worn every day for a decade :lol: ...maybe it tears in future... Who knows... :?
Thanks one more time guys!!! :)

You're welcome. :) The rubber diaphragm swells in all the Teikei, MV28 carburetors. Many Yamaha, TW200 owners have reported the same phenomenon. ;) However, I haven't heard any reports of the rubber tearing. :)

Spud :)

Tearing must be only Xinguye bikes problem or maybe i just have had
bad " rubber ". :lol: :lol:

Hi! One more question for Zong owners...maybe it will look stupid, but as you know zongs dont have rpm-meters :)
Is it normal that it breaks/loses power in second gear on aprox 38mph (about 65 kph)? Starts to react like its way in the 'red' zone? I noticed this on a 'hard' test ride after i was playing with that problematic diaphragm so just wanna be sure everythings ok...
Finnrider made me suspicous with his situation :)
Thanks again! :)

No, it isn't normal for the bike to suddenly lose power in any gear, at any time. However, you were revving the engine very high if you were riding at 38 mph in second gear. 8O I'm pretty sure your were "over the red line" at those rpms. :roll:

Spud :)

Just wanted to be sure.Usualy i do not ride so hard on any engine,but after wrenching on it i like to step on it pretty hard once it warms up,just to be sure everything is in place...
Thanks for the answer! :)